DESCRIPTION

openbox-session runs an openbox session without any session manager. Without a session manager, you will not be able to save your state from one log in to the next.

openbox-session does not take any command line arguments.

On log in, openbox-session will run the ~/.config/openbox/autostart script if it exists, and will run the system-wide script /etc/xdg/openbox/autostart otherwise. You may place anything you want to run automatically in those files, for example:
 

xsetroot -solid grey & 
gnome-settings-daemon & 

Make sure that each line is followed by a "&" or else the script will stop there and further commands will not be executed. You can use the /etc/xdg/openbox/autostart file as an example for creating your own.